#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int  print(int n)
{
	int count = 0;
	while (n)
	{
		n = n & (n - 1);
		count++;
	}
	return count;
	/*int count = 0;
	for (int i = 0; i < 32; i++)
	{
		if ((n >>i) & 1 == 1)
		{
			count++;
		}
	}
	return count;*/

}

int main()
{
	int n = 0;
	scanf("%d", &n);
	int ret = print(n);
	printf("%d\n", ret);
}